13163890756 has 9 divisors (see below), whose sum is σ = 23037210399. Its totient is φ = 6581830644.

The previous prime is 13163890739. The next prime is 13163890757. The reversal of 13163890756 is 65709836131.

The square root of 13163890756 is 114734.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13163890757) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 200785 + ... + 258151.

Almost surely, 2^13163890756 is an apocalyptic number.

13163890756 is the 114734-th square number.

It is an amenable number.

13163890756 is a deficient number, since it is larger than the sum of its proper divisors (9873319643).

13163890756 is an frugal number, since it uses more digits than its factorization.

13163890756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114738 (or 57369 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

Multiplying 13163890756 by its sum of digits (49), we get a square (645030647044 = 803138²).

The spelling of 13163890756 in words is "thirteen billion, one hundred sixty-three million, eight hundred ninety thousand, seven hundred fifty-six".